With the HD-1’s retractable elements,
the antenna’s elements can be pulled
out to the appropriate length for the
frequency being measured. Therefore,
field technicians who use the HD-1
antenna can measure leakage with a
higher degree of accuracy because
they have the equipment to fit their
leakage measurement requirements.
Listed below is a table for the NTCA
frequencies. (See other channel plan
frequency lengths in Appendix C)
NTCA Length of Elements
Frequencies in inches
115.2750 24.50
121.2625 23.50
127.2625 22.25
133.2625 21.25
139.2500 20.25
3-19
Quick Tip –
To easily set your HD-1 antenna elements to the
appropriate length: a) Measure from tip-to-tip the
desired length. b) Fold antenna elements down to
sides of unit. c) Mark coax cable with tape. d)
Always use as quick reference to set elements to
desired length.
~ Docking Station, DS-1
The DS-1 Docking Station, designed
by ACTERNA, provides convenience to
the field technician when patrolling
for leakage sources. After the docking
station is officially installed in the
field technician’s vehicle, the docking
station provides a “heads-up” view of
the leakage meter’s graphic LCD
screen during cable leakage patrols.
In addition, when the leakage meter is
mounted in the docking station, the
leakage meter will be automatically
switched to the vehicle’s antenna and
connected to the vehicle’s 12 Volt DC
source allowing for automatic re-
charge of the leakage meter’s battery
while you patrol.
Note: Always remember to change
HD-1 dipole antenna with elements retracted
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